Julius von Hann

Julius Ferdinand von Hann (b. 23 March 1839 d. 1 October 1921 in Vienna) was an Austrian meteorologist. He is seen as the father of modern meteorology.

He studied mathematics, chemistry and physics at the University of Vienna. He was the director of the central institute for meteorology in Vienna (1887-1897), professor of meteorology at the University of Graz (1897-1890) and professor of cosmic physics at the University of Vienna (1890-1910).

In signal processing, the Hann window is a window function, called the Hanning function, named after him by R. B. Blackman and John Tukey in "Particular Pairs of Windows." published in "The Measurement of Power Spectra, From the Point of View of Communications Engineering", New York: Dover, 1959, pp. 98-99.

In the aforementioned article, the use of the Hann window is called "hanning", e.g., "hanning" a signal is to apply the Hann window to it. This is silly, of course, because no one says they are "Hamming-ing" a signal with a Hamming window. This has caused a lot of misconceptions about the name of the Hann window, leading many to call it the "Hanning window".

Works

* Die Erde als Ganzes, ihre Atmosphäre und Hydrosphäre, 1872
* Handbuch der Klimatologie, 1883
* Atlas der Meteorologie, 1887
* Lehrbuch der Meteorologie, 1901